Show me where it says they will be shipping the Neptune in "Q1", I have only seen Q1/Q2 and it go to Q2. So having it say Q1/Q2 doesn't mean it will actually ship in Q1 it means it MAY ship in Q1. So your argument isn't valid.
They said closed batch 1 will ship around a month before open batch 1 which will ship around a month before batch 2 which will ship Q2. So they have indirectly said that closed batch 1 order will ship at the latest april if everything goes as planned. Not quite Q1 but very close.
Also, there's this interview:
http://www.coindesk.com/kncminer-pre-orders-next-asic/Where it's written: "The new boxes, which will ship end of winter/early spring, according to co-founder Sam Cole". Winter is defined as december to february, and I can't imagine "early spring" means crossing over to Q2. However he also said: "adding that all specifications given to CoinDesk are pre-release and subject to change."
The vernal equinox and the first day of spring is on March the 20th in the northern hemisphere -
- Q2 starts on the 1st of April.